Tumor Lysis Syndrome in Lymphoblastic Crisis of CML

Tumor lysis syndrome (TLS) defines the metabolic derangements that occur with tumor breakdown following the initiation of cytotoxic therapy. TLS results from the rapid destruction of malignant cells and the abrupt release of intracellular materials and their metabolites into the extracellular space. The syndrome causes hyperuricemia, hyperkalemia, hyperphosphatemia, secondary hypocalcemia and uremia. It can result in acute renal failure and be fatal. Early recognition of patient at risk and preventive measures are important. There is a high incidence of TLS in tumors with high proliferative rates and large burden such as acute lymphoblastic leukemia and Burkitt's lymphoma. It less commonly occurs in solid tumors such as testicular cancer, breast cancer and small cell lung cancer. There are only a few reports on TLS complicated in CML in blast crisis. So we report a 45-yr-old woman presenting with TLS associated with CML in lymphoblastic crisis after the initiation of cytotoxic chemotherapy.

Mutant Prevention Concentration of Polymyxin B for the Clinical Isolates of Pseudomonas aeruginosa / 감염과화학요법

BACKGROUND: Infection caused by multi-drug resistant (MDR) Gram-negative organisms such as Pseudomonas and Acinetobacter species is one of emerging important problems in modern hospitals. To treat multi-drug resistant non-fermenting Gram-negatives, polymyxins which were used in 1960s, but abandoned because of grave toxicities such as renal toxicity are reused. The objective of this study was to estimate the probability of resistance development of the clinical isolates of Pseudomonas aeruginosa to polymyxins. METHODS AND MATERIALS: Twenty-nine multidrug-resistant P. aeruginosa isolates were collected from Dankook University Hospital and Seoul National University Hospital in 2000 and tested for antimicrobial susceptibility test, minimal inhibitory concentration (MIC), mutant prevention concentration (MPC) and mutant frequency to ciprofloxacin and polymyxin B. RESULTS: The MIC50 and MIC90 of polymyxin B for the isolates were 2 and 2 microgram/mL, and those of ciprofloxacin were 0.5 and 4 microgram/mL, respectively. Thirteen of 29 isolates developed polymyxin B-resistant mutants but all 29 isolates, ciprofloxacin-resistant mutants. The MPC50 and MPC90 of polymyxin B were 32 and 64 microgram/mL, and those values of ciprofloxacin were 4 and 64 microgram/mL. Mutation frequencies of polymyxin B ranged from 2 x 10(-9) to 2 x 10(-7), and those of ciprofloxacin from 4 x 10(-10) to 5 x 10(-7). CONCLUSIONS: Mutation frequencies of polymyxin B were similar to those of ciprofloxacin, suggesting appreciable development of resistant mutants with wide usage of polymyxins.

A Case of Steroid Refractory Acute GVHD Treated with IL-2 & TNF-alpha Blocker in a Myelodysplastic Syndrome Patient who Underwent Unrelated Allogeneic Stem Cell Transplantation

Hematopoietic stem cell transplantation has evolved as a central treatment modality for the management of various hematologic malignancies. Despite adequate posttransplantation immunosuppressive therapy, acute GVHD remains a major cause of morbidity and mortality, even for the patients who have received HLA identical sibling grafts. Once established, acute GVHD is difficult to treat, and the best primary treatments such as corticosteroid have shown responses of approximately 50%. Once GVHD becomes steroid-refractory, the chances of survival are slim at best, and the possibility of long-term complications from chronic GVHD is almost always the rule. Many agents are currently being evaluated to treat this malady, including ATG, monoclonal antibodies, pentostatin, denileukin diftitox, etc. We reported here on a case of steroid refractory acute GVHD that was treated with IL-2 and TNF-alpha blocker in myelodysplastic syndrome patient who underwent unrelated allogeneic stem cell transplantation.

Mutant Prevention Concentration of Polymyxin B for the Clinical Isolates of Pseudomonas aeruginosa / 감염과화학요법

BACKGROUND: Infection caused by multi-drug resistant (MDR) Gram-negative organisms such as Pseudomonas and Acinetobacter species is one of emerging important problems in modern hospitals. To treat multi-drug resistant non-fermenting Gram-negatives, polymyxins which were used in 1960s, but abandoned because of grave toxicities such as renal toxicity are reused. The objective of this study was to estimate the probability of resistance development of the clinical isolates of Pseudomonas aeruginosa to polymyxins. METHODS AND MATERIALS: Twenty-nine multidrug-resistant P. aeruginosa isolates were collected from Dankook University Hospital and Seoul National University Hospital in 2000 and tested for antimicrobial susceptibility test, minimal inhibitory concentration (MIC), mutant prevention concentration (MPC) and mutant frequency to ciprofloxacin and polymyxin B. RESULTS: The MIC50 and MIC90 of polymyxin B for the isolates were 2 and 2 microgram/mL, and those of ciprofloxacin were 0.5 and 4 microgram/mL, respectively. Thirteen of 29 isolates developed polymyxin B-resistant mutants but all 29 isolates, ciprofloxacin-resistant mutants. The MPC50 and MPC90 of polymyxin B were 32 and 64 microgram/mL, and those values of ciprofloxacin were 4 and 64 microgram/mL. Mutation frequencies of polymyxin B ranged from 2 x 10(-9) to 2 x 10(-7), and those of ciprofloxacin from 4 x 10(-10) to 5 x 10(-7). CONCLUSIONS: Mutation frequencies of polymyxin B were similar to those of ciprofloxacin, suggesting appreciable development of resistant mutants with wide usage of polymyxins.

A Case of POEMS Syndrome-Renal Involvements of POEMS Syndrome in Korea / 대한신장학회잡지

Renal involvements of POEMS syndrome are not rare. In some reports, almost 50% of patients show proteinuria. There are some case reports of renal involvement in POEMS syndrome in Korea, but there are no reports about clinical features of renal involvement in POEMS syndrome in Korea and its frequency. We report a case of POEMS syndrome with nephropathy and clinical features of renal involvement in POEMS syndrome in Korea. The most frequent symptoms in POEMS syndrome in Korea were polyneuropathy, edema and ascites. Renal involvement was found in 40% of patients. If there were unknown cause of edema and renal failure when combined with polyneuropathy, considerations should be taken into patients for POEMS syndrome even though POEMS syndrome is very rare.